Avril Lavigne released her fourth studio album, "Goodbye Lullaby," on Tuesday, March 8, 2011, which marks a comeback for the26-year-old Canadian pop punk singer, who last released a major record about four years ago.

The album contains the single "What the Hell," which Lavigne has said that it is the most "pop track on the record."

Lavigne, known for past hits such as "Complicated" and "Sk8ter Boi," released the studio album "The Best Damn Thing" in 2007. The record has sold more than five million copies worldwide. In 2010, she recorded the track "Alice," which was featured on the soundtrack of the 2010 film "Alice in Wonderland."

Lavigne has also keeping busy with her Abbey Dawn clothing line, launched at Kohl's department stores two years ago. The collection, which contains hoodies, dresses, jeans, shoes, accessories and more inspired by Lavigne's own punk rock style, is now available to fans around the world.